Henry woodward



H. WOODWARD.

'EEIMAEY ELEGTETG BATTERY.

Patented Mar. 13

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(No'iuodel.)

Mmesses:

llNrrnD STATES' HENRI.T WOODWARD, OF DETROIT, MICHIGAN, ASSIGNOE, BY MESNE ASSIGNMENTS, TO THE IVOODWAR-D ELECTRICAL COMPANY, OF

SAME PLACE.

.IPRIMARY ELECTRIC BATTERY.

SPECIFICATION forming pari: 0f Letters Patent No. 379,551, dated March 13, 1888.

Application tiled October 7, 1887. Serial No. 25L696. (No model.)

T0 @ZZ whom t may concern.-

Bc it known that I, HENRY WooDw-ARD, a subject of the Queen of Great Britain, residing at Detroit, in the county of Wayne and State of Michigan, but at present in the city ol' Toronto, Province of Ontario, Canada, have invented certain new and useful Improvements in Primary Electric Batteries 5 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to primary electric batteries.

rlhe Objectis to producea battery of as nearly constant electromotive force as possible and lof long durability.

The invention consists in an electro-negative electrode of peculiar construction. Fur thermore, in the combination, witlrsuch elec-v tro-negative electrode, of a Zinc electrode, preferably of a spongeszinc electrode.

In the accompanying drawing, forming a part of this specification, is illustrated a vertical sectional view of a primary electric battery constructed in accordance with and embodying the invention.

Referring to the drawing, A designates the jar, constructed of glass, porcelain, or other suitable material. \Vithin this jar is placed the negative element or plate B, which is made by taking a piece of iron of requisite size and shape, placing around it a jacket, C, of perforated iron, and lling the space between the casing and the piece of iron with oxide of copper and iron filings, pariugs, or turnings D, in substantially equal parts. By this coustruction a large and good conducting-surface is secured, while rapid polarization is prevented. The electrodeis placed in a causticpotash solution in acell with a proper electropositive electrode-such as zinc-and in connection therewith. The electrovpositive electrode is also iu the caustic-potash solution.

It is preferred to employ as an electro-positive electrode sponge zinc such as described in the specification of my Patent No. 347,754, granted August 17, 1886.

Having thus fully described the invention, what is claimed as new, and desired to have secured by Letters Patent, is-

l. The herein-described negative electrode, consisting of a piece ot' iron placed in a perforated iron jacket and surrounded by oxide of copper and iron filings, pariugs, or turnings, substantially as described.

2. A negative electrode composed of a piece of iron placed in a perforated iron jacket and surrounded by oxideofcopper and iron filings, parings, or turnings, in combination with a positive electrode composed, preferably, of

` sponge zinc, both electrodes being immersed in a solution of caustic potash, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY VVOODWARD. Vitnesses:

JN0. S. ANDERSON, ADAM H. MEYERs. 

